← 20ed16 21ed16 22ed16 →
Prime factorization 3 × 7
Step size 228.571 ¢ 
Octave 5\21ed16 (1142.86 ¢)
Twelfth 8\21ed16 (1828.57 ¢)
Consistency limit 3
Distinct consistency limit 3

21 equal divisions of the 16th harmonic (abbreviated 21ed16) is a nonoctave tuning system that divides the interval of 16/1 into 21 equal parts of about 229 ¢ each. Each step represents a frequency ratio of 161/21, or the 21st root of 16.

Intervals

Steps Cents Approximate ratios
0 0 1/1
1 228.6 17/15, 25/22
2 457.1 13/10, 17/13, 22/17
3 685.7
4 914.3 17/10, 22/13
5 1142.9 25/13
6 1371.4 11/5, 20/9
7 1600 5/2
8 1828.6
9 2057.1 23/7
10 2285.7 15/4
11 2514.3 17/4
12 2742.9
13 2971.4
14 3200 19/3
15 3428.6
16 3657.1 25/3
17 3885.7 19/2
18 4114.3
19 4342.9
20 4571.4
21 4800